con·trib·u·to·ry 
(kən-trĭbyə-tôr′ē)
(kən-trĭbyə-tôr′ē)adj.
1. Of, relating to, or involving contribution.
2. Helping to bring about a result.
3. Subject to an impost or levy.
n. pl. con·trib·u·to·ries
One that contributes.
- exciton
- excitor
- excitotoxic
- excitotoxin
- excl.
- exclaim
- exclaimer
- exclamation
- exclamation point
- exclamatory
- exclave
- excludability
- excludable
- exclude
- excluder
- excludible
- exclusion
- exclusionary
- exclusionary rule
- exclusionism
- exclusionist
- exclusionistic
- exclusion principle
- exclusive
- exclusive disjunction